(CNN) - CNN projects Mitt Romney will win all three of Tuesday's Republican presidential primaries, including Wisconsin, where the loss for Rick Santorum may damage his ability to convince Republicans that he can stop Romney from getting the nomination.

Romney's wins in Wisconsin, Maryland and the District of Columbia will put him past the halfway mark to the 1,144 delegates needed to clinch the nomination and add to a wide delegate lead that he holds over the other major GOP presidential candidates, according to CNN estimates.

(CNN) - As the president's re-election team starts showing more muscle on the campaign trail, Mitt Romney sharpened his attacks against President Barack Obama Tuesday, hitting his potential opponent as hypocritical and "disingenuous."

"He says things which are designed to solicit applause and affirmation, but in reality, he does very different things than what he's saying," Romney said on Sean Hannity's radio program.FULL POST